Journalist Nick Reding talks about how crystal methamphetamine has ravaged small towns in the American heartland. He tells the story of Oelwein, Iowa, a depressed town left in the dust by the consolidation of the agricultural industry and loss of residents, that is now coping with a meth epidemic. His book Methland: The Death and Life of an American Small Town is based on four years of reporting in Oelwein.